Wheatstone bridge is an arrangement of _________ resistors used for accurate measurement of resistance.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. four.
The Wheatstone bridge is an arrangement of four resistors used for accurate measurement of an unknown resistance. It consists of two parallel branches, each with two resistors, connected to a voltage source. A galvanometer is placed between the branches to detect any imbalance in current flow. When the bridge is balanced, the ratio of resistances in one branch equals the ratio in the other, allowing precise calculation of the unknown resistance using a simple mathematical formula.